Apparatus for drying, charring, and otherwise treating loose material



June 2 5, 1929.

0. DOBBELSTEIN APPARATUS FOR DRYING, CHARRING, AND OTHERWISE TREATING LOOSE IATERIAL Original Filed-Dec. 12, 1924 2 Sheets-Sheet l Otbjauufi b f roli-neaalkltldz June 25, 1929- o. DOBBELSTEIN APPARATUS FOR DRYING, CHARRING, AND OTHERWISE TREATING LOOSE MATERIAL Original Filed Dec. 12, 1924 2 Shee ts-Sheet 2 Ot o Baklava, Dram-rad alrrulaislvablk 1.,- fltte w Patented June 25, 1929.

UNITED STATES PATENT OFFICE.

OTTO DOIBBELSTEIN, DECEASED, LATE OF ESSEN-ON-THE-BUHB, GERMANY, BY KARO- LINE DOBBELSTEIN, ADMINISTRATRIX, OF ESSEN-ON-THE-BUHB, GERMANY.

APPARATUS FOR DRYING, CIIARRIING, AND OTHERWISE TREATING LOOSE MATERIAL.

Original application filed December 12, 1924, Serial No. 755,373,:1nd in Germany December 18, 1983.

Divided and this applicationfiled October 24, 1928. Serial No. 314,810.

The invention relates to improvements in apparatus for drying, charring and otherwise treating loose material such as ore, coal, bituminous slate, argile, and the like, and the 5 object of the improvements is to provide an apparatus by means of which a large mass of material may be uniformly and rapidly heated. Another object isto provide an aparatus which does not give rise to dust when eing operated, and in which .the parts are readily accessible. With these objects in view the improved apparatus consists of a ro tary drum composed of a plurality of narrow chambers disposed transversely of the axis 115 of the drum, one part of the said chambers being designed to receive the loose material and the other one to be traversed by a suitable heating medium. In addition means are provided for charging the chambers with the looszei material while the drum is slowly rotate , The number and the dimensions of the said chambers, the character of the heating medium, the temperature, the velocity of the rotation of the drum, and the time of the 'operation may be difierent, according to the character of the material and the result aimed at.

For the purpose of explaining the invention several examples embodying the same have been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawings,

Figure 1 is a vertical cross-section of one form of the invention. taken through the middle of Figure 2, looking to the left;

Figure 2 is vertical longitudinal section through Figure 1, looking to the right; and

Figure 3 is a view similar to Figure 1 of a modification.

This application is a division of the copending application Serial No. 755,373, for apparatus for drying, charring and other wise treating loose material, filed December 12. 1924.

In the example shown in Figures 1 and 2, the improved apparatus comprises a cylinsegmental foraminated section 70.

Within the cylindrical casing there is a rotary drum composed of end walls 92 and 93 formed with transverse annular walls 94 providing narrow chambers 74 and 95, alternatedrical casing having its wall composed of a ly connected at their inner and outer circumferences of the drum by annular walls 74 and 95'. be described later.

As shown the foraminated part of the wall of the casing extends nearly over the whole circumference, and it is provided at one side with two openings 71 and72 se arated from each other by a partition 3. Through the opening 72 the material is forced into the chambers 74 by means of a plunger 75 disposed at the bottom part of a. funnel 76. Through the delivery opening 71 scrapers 77 are passed into the chambers 74, which scrapers are formed with sloping top faces for removing the material from the chambers and delivering the same into a discharge passage 78.

A housing 79 envelops the casing and provides a passage surrounding the foraminated wall 70 and divided by a partition 80 into two parts 81 and 82 communicating respectively Axial bores at the center will I with pipes 83 and 84 for separately removing the gas or vapor from the material.

The axial flue or bore of the drum formed by walls 74 is divided by longitudinal partitions 85 and 86 into three sections 87, 88 and 89 adapted to be successively traversed by the heating gas. The tubular members 90 and 91 for the admission and discharge, respectively, of the heating gas, are secured to stationary disks 92 and 93, spaced from the first and last ones of the transverse partitions-94 and closing the ends of the casing; and the partition 85 is secured to both disks 92 and 93, while the partition 86 is secured only to the disk 92 and spaced with its opposite end from the disk 93. The member 90 is supplied with heating gas through pipes 90.

In the operation of the apparatus the loose material, such as coal. is forced into the chambers 74 by means of the plungers 75, and while the drum is slowly rotated. After being sufficiently heated, the material is removed from the chambers by the scrapers 77. The heating gas flows from the tubular member 90 at first through the sectional flue 87 thus heating the material at the part next to the delivery opening 71, thereafter itflows in the reverse direction through the sectional flue 88, and finally it flows through the flue 89 and the outlet 91, the flow of the gas being indicated heating gas by arrows 2. At all times the fills the chamber 95.

ion

In some. cases it may not be desirable to expose the material to the high temperature of the gas flowing through the sectional flue 87. In such cases, as shown in Figure 3, the

charging apparatus 76 is disposed above the delivery opening 71, and the drum is rotated in the direction opposite to the arrow w. The scrapers 77 and opening 71 are below the hopper 76.

The housing 79 may have an outlet 18 at the bottom to permit any liquid material deposited inside to drain out of the receptacle 19.

What is claimed is:

1. An apparatus of the class described,

comprising a rotaryv drum having an axial dine and divided into annular material holding compartments and alternatingl heating chambers located one behind the ot er in the direction of the axis of the drum, partitions dividing the axial flue into communicating parallel intake and outlet passages adapted to be successively traversed by theoheating gas, said chambers constituting open continuations of said passages and said compart- 5 ments being exposed thereto to insure direct ing compartments andalternatin heating chambers located one behind the ot er in the direction of the axis of the drum, partitions dividing the axial flue into communicating parallel passages adapted to be successively traversed by the heating gas and comprising an intake passage, an intermediate passage and an outlet passage, said chambers constituting open continuations of said passages and said compartments being exposed thereto comprising a rotary drum having an axial flue and divided into material holding C0111- partments and alternating heating chambers located one behind the other in the direction of the axis of the drum, the compartments being openat their outer circumference and being adapted to be charged with material to be heated and to discharge the same at different parts of the circumference of the apparatus, .a casing enveloping the drum including side closures for the axial flue, partitions supported by the side closures and dividing the axial flue into communicating parallel intake and outlet passages adapted to be successively traversed by the heating gas, said chambers constituting open continuations of said passages and said compartments being exposed thereto to insure direct and uninterrupted flow of the heating gas to and about said compartments, and sa1d intake passage being of less cross-sectional dimension than the outlet passage so as to force distribution of the incoming heating gas to and about said compartments.

In testimony that I claim the foregoing as the invention of 0'1'10 DOBBELSTEIN, deceased, and have signed my name hereto.

.KAROLINE DOBBELSTEIN, Adm/im'stmtm'w of the Estate of Otto Dobbelsteim deceased. 

